Money-Engine x402 Research

• x402_health — Free liveness + pricing for the money-engine Research API (x402 USDC on Base). Ladder: free sample_outline → outline 0.01 → brief 0.02.
• x402_discovery — Free x402 discovery document (resources, prices, payTo, facilitator, convertLadder).
• x402_sample_outline — FREE research teaser (3 bullets). Convert ladder: this tool → paid x402_research_outline 0.01 USDC → x402_research_brief 0.02 USDC Base. Body {topic?} default x
• x402_sample_scrub — Free sample data-scrub / leak-guard teaser (dirty→clean demo). Alt path — primary convert is x402_sample_outline → outline 0.01.
• x402_research_outline — Paid research outline (0.01 USDC Base · first pay). Free first: x402_sample_outline. Body {topic}. Without paymentHeader returns 402 + accepts[].
• x402_research_brief — Paid full research brief (0.02 USDC Base · upgrade). Free first: x402_sample_outline; optional outline 0.01 first. Body {topic}. Without paymentHeader returns 4

No long description beyond the summary.